Arachnid · GBIF taxon 2168338
Fencepost jumping spider
Marpissa muscosaAlso known as Mossy Jumping Spider
Fencepost jumping spiders are large, stocky Salticids renowned for their cryptic greyish-brown camouflage that blends seamlessly against weathered wood and bark. Using exceptionally keen forward-facing vision, these diurnal hunters stalk flies, gnats, and leafhoppers before pouncing with remarkable accuracy. Females construct silk retreats beneath loose bark or fence crevices, where they guard their egg sacs and overwinter through cold months.
ArachnidDiurnalJumping Spider
—observations
—countries
—peak records
Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Diet & prey
- Flies
- Moths
- Small beetles
Predators
- Birds
- Lizards
- Parasitoid wasps
ThreatsPesticide use, loss of natural woodland habitat
HabitatsWoodlands, wooden fences, tree bark, garden structures
Life span1–2 years
Size / weightNot available
Classification
- FamilySalticidae
- SpeciesMarpissa muscosa
Range data is not available yet.
Interaction riskLow
- Low
- Moderate
- High
- Very high
- Why interaction risk is low
- Harmless to humans; safe to observe closely as it hunts on sunny wooden surfaces.
Responsible observation
- Look on Sunlit Wood: Scan wooden fences, tree trunks, and park benches on warm, sunny afternoons.
- Approach Slowly: Move cameras or hands gradually to avoid triggering their jump reflex.
- Watch Their Eyes: Observe how their large central eyes pivot and track nearby movement.
Frequent Companion (c) Анатолий Озерной /Anatoly Ozernoy, some rights reserved (CC BY-SA), uploaded by Анатолий Озерной /Anatoly Ozernoy · cc-by-sa
Ecological Counterpart (c) Kevincollins123, some rights reserved (CC BY-SA) · cc-by-sa
Close Relative (c) Alexis Tinker-Tsavalas, some rights reserved (CC BY), uploaded by Alexis Tinker-Tsavalas · cc-by
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